- Nim 2.x has moved the DB connectors outside the standard library to
the `db_connector` package.
- Refactor the pooling implementation and macro expectations to use the
`withConnection` name instead of `withConn`. This change allows a
caller to use a [waterpark](https://github.com/guzba/waterpark) pool
instance instead of the builtin pool instance. Waterpark provides
better support for multi-threaded environments. The builtin pooling
mechanism may be deprecated in favor of waterpark in the future.
- Add the `getModelIfItExists` generated proc to the list of standard
procs we generate. This is a flavour of `getModel` that returns an
`Option` instead of raising an exception when there is no model for
the given id.
- Change `PaginationParams#orderBy` to accept a `seq[string]` to allow
for sorting on multiple fields.
